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oai:repisalud.isciii.es:20.500.12105/177062024-11-29T16:23:12Zcom_20.500.12105_2173com_20.500.12105_2051col_20.500.12105_19597

00925njm 22002777a 4500 dc Fernandez-Capetillo, Oscar author Allis, C David author Nussenzweig, André author 2004-06-21 Posttranslational modifications of histone tails regulate numerous biological processes including transcription, DNA repair, and apoptosis. Although recent studies suggest that structural alterations in chromatin are critical for triggering the DNA damage response, very little is known about the nature of DNA damage-induced chromatin perturbations. Here we show that the serine 14 residue in the NH(2)-terminal tail of histone H2B is rapidly phosphorylated at sites of DNA double-strand breaks. At late time points after irradiation, the phosphorylated form of H2B, H2B-(Ser14P), accumulates into irradiation-induced foci. H2B-(Ser14P) foci formation is not associated with the apoptotic phosphorylation of H2B but is strictly dependent on the phosphorylated isoform of H2AX. Our results broaden the spectrum of histone modifications that constitute the DNA damage "histone code" and suggest a model for the underlying chromatin structure within damage-induced foci. J Exp Med . 2004 ;199(12):1671-7 10.1084/jem.20032247 0022-1007 The Journal of experimental medicine 15197225 http://hdl.handle.net/20.500.12105/17706 Phosphorylation of histone H2B at DNA double-strand breaks.